Title: Exhaust emissions from heavy-duty vehicles

Authors: Tim Barlow, Ian McCrae

Addresses: TRL Limited, Old Wokingham Road, Crowthorne, Berks, RG45 6AU, UK. TRL Limited, Old Wokingham Road, Crowthorne, Berks, RG45 6AU, UK

Abstract: Exhaust emission tests were conducted on 20 heavy-duty vehicles. These test vehicles were Euro 1 and Euro 2 compliant and included coaches, and trucks ranging from 7.5 to 38 tonne vehicles. The vehicles were tested over the European 13-mode and the FIGE engine dynamometer tests, with some of the vehicles repeat tested using an ultra low sulphur diesel fuel (ULSD). A single test vehicle was tested over a selection of real world driving cycles. In general, Euro 2 vehicles demonstrated lower emissions than Euro 1 vehicles. The ULSD produced large decreases in the emissions of CO and PM with a smaller decrease in NOx. Although Euro 2 vehicles produced less mass of particulate, the number of particles emitted significantly increased when compared to Euro 1. The FIGE and the Truck cycles produced the lowest and similar emission rates, while the bus cycle produced much higher levels, reflecting the importance of vehicle operation on emissions.

Keywords: HDV emissions; particulates; fuels; test cycles.

DOI: 10.1504/IJVD.2001.001970

International Journal of Vehicle Design, 2001 Vol.27 No.1/2/3/4, pp.262-274

Published online: 15 Aug 2003 *

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